eric_ja

u/eric_ja


r/PostgreSQL•

Is it possible to "compose" or use different types of indexes together? For example, let's suppose I have JSON documents, which are handled by jsonb + GIN indexes, and I also have geographical data, indexed by geometry + GIST. If they are combined, say JSON documents containing geographical data in GeoJSON format, is it possible to use both index types together for queries like "find all documents that reference a point within a certain boundary"?

12

r/homebuilt•

Hi everyone, I have been researching using a G13BB engine. Making a gearbox is out of my skill level so I'm looking for some kind of kit. So far I've found:

  • AeroMomentum (Mark Kettering)
  • Raven Redrives
  • Air Trikes (Vassili Tarakanov)

Any others I should know about? Any experiences to share?

62

r/AskElectronics•

I am looking to get into USB-C and wondering if there are any good chips/chipsets to play around with. I'm particularly interested in PD and Alt Modes (not so much superspeed), so I guess what I'm looking for is a PD microcontroller and a mux switch(?)

74

r/PSoC•

Looks like the 4200L's have hit Mouser and Arrow. I'm grabbing the L kit, does anyone have any thoughts? The feature set looks like a nice boost, the high pin count options, and I really like the idea of 16-bit USB, but I'm a little bit concerned about the cost, quite high for a Cortex-M0 uC.

14

r/PSoC•

Just curious if folks had any tools, tips, or techniques that you use when designing for the datapath. I love the datapath, but it is certainly one of the more complex components of the system and I sometimes struggle to wrap my head around what it can do and how to apply it to my problem. My current design methodology consists of writing text files of pseudo-assembly language, pseudo-verilog chickenscratch. Any suggestions?

30